Selecting co-linear nodes

Hello , Good Morning everyone

 

I am trying to prepare a script which will

1.go through geometry detect all holes

2. detect for co linear holes 2 or more, note center nodes

3. create a spider with hole and center node and beam between two hole center

 

Right now I am able to achieve 1st and 3rd step but not able resolve second step

 

Any one have any suggestion for this?

 

Thank you